Telegraphy.



P. B. DELANY.

- TELBGRAPHY. I V

- v APPLICATION FILED MAB-43,1907. 981 845 Patented Jan.'17,19.11. '2 snnn'r s-sann'r 1.

- "Arrow/5y P. B. DBLANY. TELEGRAPHY. .gPPLIflATION FILED MAILZS, 1907.

Patented J an. 17, 1911.

2 kmmevsmm 2.

Attest:

Atty 25 tapping between the-sending and receiving 9 instrument. This result is accomplished by labor, business or politics, and in state I communication in plain language without Morse characters or letters precisely as BEST AVAILABLE COP 1 UNITED sirntrns rarENT O FICE,

PATRICK B. DEL'ANY, OF SOUTH-ORAILTGE NEW JERSEY, ASSIGNOR TO DELANY TELE- GRAPHIC TRANSMITTER COMPANY, OF NEW YORK, N. Y., -A CORPORATION OF MAINE.

Specification of Letters Patent.

4907. serial No. 364,158.

rELEoRAriaY.

Patented Jan. 17, 191i.

To all whom it may coneem: 1;

Be .it known that I, Pig-rural; B. DELANY, 'a citizen of the United Statos'; residingdnfl South Orange,v county of; Essex, State or New Jersey, h'a-ve inventedcertain Improvements in Telegraphy, of which the foilowlng is a specification. c 1

This invention relates particularly to secret transmission and involves. the use of two Wires or circuits for-part or all of the 'way'as may be deemed advisable. It is not assumed that this system would he used for ordinary commercial handling of telegraphic business, but rather for nivate cirv cuits and on occasions when secrecy without the trouble :and delay of conversion of messages into code and the loss or" tin 1e in deciphering -is desirable, and Where the absolute protectiongained would more than warrant the use of an extra Wire. In times of disturbanceand excitement, Whether offairs this system would afl'ord instantaneous possibility of leakage or successful Wire sending the dots andthe'dashes of the Morse code over separate Wires and if necessary, over different routes to the I point to be. reached. Thus a message for Chicago might havethe dots go via Albany and Buffalo. while the dashes were sent via Philadelphia and Pittsburg, both to reach the receiver at Chicago in their regular order to form though they had come OVEIJl single wire in the ordinary Way, or instead of sending the dots over one circuit and the dashes over another, the impulses Whetherdots or dashes comprising a letter n'iay be alternated over: the t-Wo circuits. The arriving signals are recorded in their proper sequence by a com mon receiver exactlyas if they had been sent over a single circuit in the ordinary way.

In theaccoinpanying drawings, Figures 1; i 2, 3, .4, 5 and 6, show diagrammatically ditferent applications of the inventifinl Referring to Fig. 1, K is an auto dot key. I 'is the dot key-lever the and -01 which adapted to strike a projection on a pivoted block Z1 held in normal position by a spring 70 applied to a rigid arm is? projecting. from the-block. In the blockis fixed a spring blade Zrcarrying a stiff grin '11 which may herprovided with an adg'ifstable Weight '0. When the finger piece of lever Z is pushed to the right the block 70 is rocked until arrested by impact of k against its limiting stop, the action of which is to set 0" in vibration to make dot contacts with '0 which is, connected through the Morse relay R to the transmitting battery 6. These dots go over Wire /V via one roiite to the receiver 13 at the distant station. IVhen' dashlever Z is pressed against itsfiiontact c (lashes are sent over Wire 1V- to the same receiver.

Fig. 2 representsthe same organization as Fig. 1 but with awhalancing arrangement D at the receiving end. Should the Wire \V for instance be of greatly lower resistance than wire W- crimpensation can be made by the adjustable' resistance;I). As the system is operable uhder Widely dilierent circuit conditions balancingof any kind Will rarely be necessary but if'it sl1ould,'eitherresistance capacity or inductance may be added to either-wire in Ways well known.

'Fig. 3, shows the system as operated over 7 alternatin ly'as in Fig. L.

I Obvious y this system maybe applied to quadruplox. duplex, multiplex; or any circuits however organized, that is,.in the case of :r quadruple): it is onlynecessary to make both receiving relays operate the same soundcr as shown in Fig. 6; orthe receivers of two duplex circuits may be combined to Worlea single sounder in the same Way. At siggpon A the dot making vibrator 7c and its contact operate transmitter t of'the No. I

or polar side of a quadruplex', while dash lever l operates the transmitter t of the which maybe used for sending the signals E0. 2 or neutral side. At the receiving station B, -the polarized relay 7?, operated by transmitter '3, records the dots at sounder S, Wh le neutral relay it operated by trans.-

a"1etter' orbharacter-ovenne clrcuit and another cimuit and uniting both parts in their proper relation at a common receiver, 4

In testimony whereof, I had e hereunto subscribed my name.

PATRICK B. DELANY.

Witnesses EDWARD C. DAVIDSGN,

L. F. BROWNING.

anothefpart of said Ietti pi?- dhq'racter ver 

